Diet is a basic requirement for human health, and improved eating can enhance patients’ physical fitness and improve their ability to resist pain. However, tumor patients are affected by various factors, and diet often becomes an important obstacle to their recovery. Therefore, it is necessary to pay attention to the dietary regulation of patients. We should correct two misconceptions of dietary management: one is to strictly control the amount of food to “starve” cancer cells, and the other is to think that cancer is a “rich disease”, so we have to eat a lot of tonic. Because cancer cells proliferate fast, the rapid consumption of nutrition leads to nutritional deficiency of the human body and decreases anti-cancer ability. At the same time, cancer seriously destroys the functions of various organs of the human body, resulting in loss of appetite, loss of appetite, decline in the functions of digestive organs, and large tonic will aggravate the obstacle of gastrointestinal digestion and absorption functions, and aggravate anorexia. The basic requirements of diet are: total calories should be enough, nutrition should be balanced, food structure should be reasonable, cooking method and eating method should be exquisite. 1.Total calories The total daily calorie intake of cancer patients from food is generally not less than the minimum requirement of normal people, i.e., more than 10 kilojoules per day, meanwhile, because of the high protein decomposition in cancer patients, the demand for protein should be increased. Generally, the daily intake of protein should be more than 1.5 grams of body weight, and it should be mainly high-quality protein, such as eggs, milk, meat, soybean products and so on. 2, nutrition should be relatively balanced according to the needs of the patient, the nutrients should be relatively appropriate amount, complete, in addition to sufficient high-quality protein intake, generally should be low-fat, moderate carbohydrate-based. Attention to supplement vitamins, inorganic salts, fiber, etc., which can be obtained from fresh vegetables and fruits. 3, the structure of the recipe should be reasonable Cancer patient recipes should be more varieties, new patterns, reasonable structure, in the production of recipes, to do as much as possible: light and high nutrition and high quality amount of combination of soft and easy to digest and rich in vitamins combination of fresh and food hot and cold temperature and flat flavor combination of the supply of the total amount and the patient’s internal organs of the combination of cold and hot and solid evidence. It is best to do under the guidance of a doctor. 4, cooking methods and eating methods to pay attention to, and try to enhance the patient’s appetite in the selection of food, production, cooking, should create a good sense of food traits, in color, aroma, taste, shape on the effort, as far as possible, suitable for and to meet the patient’s taste preferences and habits. Also according to the patient’s digestive ability, to take a small amount of meals, coarse and fine matching, fluid, soft food and hard food alternation, sweet and salty interchangeable form of meals. When eating, we should create a pleasant atmosphere and try to eat with relatives. Before eating, try to avoid bad stimuli such as the smell of oil and smoke. In the patient’s radiation, chemotherapy interval, grasp the appetite to improve the favorable time to supplement nutrition. 5, pay attention to drinking water, water is an important part of the human body, the newborn body water content accounted for 75% of body weight, adults accounted for 60%. Water is an important material basis for regulating various physiological activities of the human body, the digestion and absorption of various nutrients, metabolism need water. General adult daily intake and discharge maintained at about 2600ml. Cancer patients often have serious water electrolyte disorders, and should drink no less than 1500ml of water per day as much as possible, and should increase and supplement salt when they have fever, diarrhea or sweat a lot; those with cardiac and renal insufficiency, ascites and edema should control the intake of water and salt.